Castrol A747 is a specially formulated low ash, Part synthetic based hybrid.

high performance motor oil based on ester and castor,

For use in multi cylinder, water cooled, race prepared motorcycle engines. Also useable in Karts, Model Cars.

FIM Road Racing World Championship

Castrol A747 is a very high performance, low ash, part synthetic lubricant with castor oil, specially formulated for use in two stroke engines fitted to road racing machines, where combustion chamber deposit control is essential. Also useable in Karts, Model Cars.

This also contains special additives to prevent throttle slide sticking in wet weather conditions and may be used mixed at fuel/oil ratios of up to 40:1.